石油地质气相色谱及气相色谱-质谱实验室比对结果评价

Evaluation of laboratory comparison results of GC and GC-MS in petroleum geology industry

为了解全国石油地质行业气相色谱及气相色谱-质谱实验室间的检测能力,提高检测水平,促进行业间交流,由石油地质勘探专业标准化委员会牵头,组织全国石油地质相关实验室开展了比对工作。气相色谱及气相色谱—质谱分析测试比对共有全国23家实验室参与,选取全油、饱和烃和芳烃3类样品,根据相关标准规定了统一的实验方法,利用四分位数稳健统计方法评价了各实验室数据质量。结果表明,各实验室数据稳定、可信,分析结果的重复性和再现性良好。气相色谱全油轻烃比对参数合格率为95%,饱和烃和芳烃参数合格率均为97%;气相色谱—质谱比对饱和烃参数合格率100%,芳烃参数合格率为95%,总体满意率较高。部分实验室相关参数出现问题数据及离群值主要原因与样品储存条件、保存时间、仪器型号、测试方法以及人员操作误差等相关,建议各实验室加强质量管控措施,进一步提升实验室气相色谱及气相色谱—质谱检测能力水平。

In order to learn about the detection capability of GC(gas chromatography)and GC-MS(gas chromato⁃graphy-mass spectrometry)laboratories in the petroleum geology industry of China,improve the detection level of the laboratories and promote inter⁃industry exchanges,the Standardization Committee of Petroleum Geological Exploration organized a comparison study among the petroleum geology laboratories throughout the country.A total of 23 laboratories participated in this study.Total hydrocarbons,saturated hydrocarbon and aromatic hydro⁃carbon samples were selected,and the experimental method was specified according to relevant standards.The data quality of each laboratory was evaluated using the quartile robust statistical method.The results show that the data of the laboratories are stable and reliable,and the analysis results have good repeatability and reproducibility.The qualification rate of total hydrocarbons light hydrocarbon ratio parameters of GC is 95%,and the qualification rate of saturated hydrocarbon and aromatic hydrocarbon parameters is 97%.The qualification rate of saturated hydrocarbon parameters of GC-MS is 100%,and the qualification rate of aromatic parameters is 95%.The overall satisfaction rate is high.The main reasons for the problematic data and outliers of relevant parameters of some laboratories are the storage conditions,storage time,instrument model,test method,personnel operation errors,etc.It is suggested that the laboratories should strengthen quality control measures to further improve the GC and GC-MS detection capabilities.